Robins... and not the wintering population

Today I noticed that Robins have begun to return to the area... I have seen more wintering Robins this year than any other year... Hundred or so... but these Robins were all Males and in a group of 10... One of them singing form the roof top.... Spring is closing in.... Also saw 3 Turkey Vultures today.... Still no Killdeer.. I expect them in the next few days...